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Chemical Engineering - Heat Transfer

Exercise : Heat Transfer - Section 9
1.
In a heat exchanger, the rate of heat transfer from the hot fluid to the cold fluid
varies directly as the area and the LMTD.
directly proportional to LMTD and inversely proportional to the area.
varies as square of the area.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
2.
With increase in temperature, the total emissivity of conductors
increases
decreases
remains same
decreases linearly
Answer: Option
Explanation:
No answer description is available. Let's discuss.
3.
Loss of heat from untagged steam pipe to the ambient air is by
conduction
convection
radiation
all (a), (b) & (c)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
4.
Fruit juice (a heat sensitive material) can be concentrated in a __________ evaporator.
long tube
falling film
high pressure
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
5.
Tubes are held between top and bottom tube sheets in Calenderia type evaporator by keeping
both the tube sheets fixed.
both the tube sheets floating.
the top tube sheet floating and bottom tube sheet fixed.
the top tube sheet fixed and the bottom tube-sheet floating.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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